Marvel is going to have one hell of a year in 2019, with Captain Marvel, Avengers: Endgame, and Spider-Man: Far From Home all coming out. However, the company's 2020 is kind of a mystery, with Guardians of the Galaxy Vol. 3 being the sole announcement for next year before being put on hold after the firing of James Gunn. Kevin Feige has commented on the manner, surprising fans by wishing Gunn and DC luck.
Gunn is currently writing the script for Suicide Squad 2, though the option for him to direct is also there. Feige is excited for what Gunn will be bringing to DC and the Suicide Squad, noting that he himself is a fan of DC's work and applauded Aquaman, calling it a cool movie.
"I went to see Aquaman last night and I really, really enjoyed it. And you know me, I've always supported [them]. I don't see a rivalry, I see cool films being made. And one thing you know about James Gunn, he makes cool films."
As for Guardians of the Galaxy Vol. 3, Feige said it's still in the works but will appear in "a later time." It seems like the search for a new director is still on, though they might be keeping Gunn's script. That or suffer the wrath of some actors leaving the film, which won't be good for anybody.
James Gunn was fired after controversial tweets he made more than a decade ago were unearthed by Trump supporters who didn't like his anti-Trump comments. The jokes he made were pretty bad but the fact that he's shown significant growth since then proves that Gunn shouldn't have been fired. If people get fired for comments they made years ago, we're telling society that people can't change.
Guardians of the Galaxy Vol. 3 doesn't have a release date, as of this writing.